"Does a 1031 Exchange Deadline Get Shorter at the End of the Year? The 180 Days, Your Tax Return Due Date, and the Extension That Keeps Them"

Your rental property closed on November 20, 2026. The proceeds went to the qualified intermediary, the company that holds the money so you never touch it, and you counted 180 days forward on your phone and got May 19, 2027. You have a replacement property picked out and a seller who is fine with a May closing. Then your CPA mentions April 15, and you can't tell whether that was a tax comment or a comment about your exchange.

Yes, a 1031 exchange deadline gets shorter at the end of the year. Treasury Regulation 1.1031(k)-1(b)(2) ends the exchange period on the earlier of two dates: the 180th day after you transfer the property you sold, or the due date, with extensions, of your tax return for the year of the sale. For a calendar-year individual whose 2026 return is due April 15, 2027, a sale that closed on or after October 18, 2026 runs out of days on April 15 unless that return is extended. The replacement purchase, loan included, has to close inside whichever window applies.

The April 15 your CPA mentioned is the date your exchange ends unless the return is extended, and it is also the date your replacement loan has to fund by.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, licensed in fifteen states, NMLS #483943, through C2 Financial Corporation. I'm not a tax advisor, and every tax question on this page goes to your CPA. I wrote it because the replacement loan is the part of a 1031 exchange that I handle, and that loan has to fund inside the same window the tax rule sets.

Does the 1031 exchange deadline get shorter at the end of the year?

The regulation sets two clocks, and both start on the day you transfer the property you sold. Paragraph (b)(2)(i) of the regulation gives you 45 days to identify the replacement property in writing. Paragraph (b)(2)(ii) gives you the exchange period, which is the time to actually receive the replacement property. It ends at midnight on the earlier of two dates. One is the 180th day after the transfer. The other is the due date of your tax return for the year the transfer happened, counting any extension you file for.

Most of the year, the 180th day comes first and the return due date never comes up. For a sale late in the year, the 180th day lands after April 15, so the return due date becomes the deadline, and every day after it is a day you were counting on and do not have. The 45-day identification period is 45 days whenever you sell, and the return due date does not shorten it.

The closing dates in 2026 that lose days

The dates below count the day of transfer as day zero, so a transfer on October 17 has its 180th day on April 15. Your qualified intermediary and your CPA set the official dates for your exchange, including which day counts as the transfer date.

Date you transfer the property you sold	180th day	Deadline without an extension	Days lost without one
October 17, 2026	April 15, 2027	April 15, 2027	0
October 18, 2026	April 16, 2027	April 15, 2027	1
November 20, 2026	May 19, 2027	April 15, 2027	34
December 31, 2026	June 29, 2027	April 15, 2027	75

October 17, 2026 is the last transfer date that keeps its full 180 days on its own, because its 180th day is April 15 itself. From October 18 on, each later closing loses one more day, and a December 31 closing loses 75 of them.

That table assumes a 2026 return due April 15, 2027. A business that files its own return, or a taxpayer on a fiscal year, can have a different due date, and your CPA confirms which return the regulation keys to and when it is due.

A tax return extension restores the full 180 days

The regulation says the due date counts "including extensions." If you file for an extension of your 2026 return, the extended due date is the one the regulation compares against the 180th day. For a late-2026 sale, the 180th day then comes first again. For an individual, the extension request is IRS Form 4868.

Two things go with it, and both come from your CPA:

• Your CPA files the extension and tells you when to file the return. The regulation ties the end of your exchange to the return for the year of the sale, so the timing of that return and how the exchange gets reported on it are questions your CPA answers before anything is filed.
• Your CPA confirms your own due date and whether an extension fits the rest of your tax picture.

If you sold late in 2026 and you want the whole 180 days, you and your CPA extend the 2026 return, you keep the exchange open with the qualified intermediary, and we close the replacement property by the 180th day.

Federally declared disasters can move the dates

The IRS can postpone the 45-day and 180-day deadlines for a 1031 exchange affected by a federally declared disaster. Each relief announcement names the areas it covers, and they are listed on its page for tax relief in disaster situations. If you or either property are in an area the IRS has named, your CPA checks whether the relief covers your exchange and what the postponed dates are.

The replacement loan has to close inside the same window

The regulation says you have to receive the replacement property by the deadline. A financed purchase can't close until the loan funds, so the exchange period is also the loan's deadline.

One of the lenders I work with spells out, in its own guidelines, what it needs on a 1031 purchase. The loan has to be on an investment property. The money from your sale has to be held by a qualified intermediary the whole time, with the paperwork to show it. The lender asks for the sales contract on the property you sold and the 1031 exchange agreement along with the usual loan documents. The replacement property has to have been identified within 45 days of your sale. All of the proceeds have to go into the like-kind property within 180 days of that sale; like-kind here means real property exchanged for real property. Title can be held in a business you own, such as an LLC, under that lender's own rules for holding title that way.

The exchange agreement and the qualified intermediary's records are how the lender sees that the intermediary, not you, held the money. The replacement loan has to fund by the same date your exchange period ends, whether that is day 180 or your return due date.

Fannie Mae's Selling Guide B3-4.3-10, Anticipated Sales Proceeds, says assets for the down payment from a like-kind exchange are eligible if properly documented and in compliance with Internal Revenue Code Section 1031. Your exchange money can be your down payment on a conventional investment property loan, once the exchange is documented. How underwriters trace the money in your accounts covers the rest of the paper trail.

Investment property loans and DSCR loans are both products I originate, and either one can be the replacement loan. A DSCR loan is qualified on the property's rent against its payment rather than on your tax returns, which can fit an investor whose returns carry a lot of depreciation. How a DSCR loan's coverage ratio works walks through the arithmetic. A conventional investment property loan looks at your income, your rental income history and your reserves after closing. I'd rather talk through which one fits while your written identification list is still being put together.

If the replacement is a home you hope to live in someday, the loan still closes as an investment property on day one. A 1031 exchange into a home you plan to live in puts the IRS safe harbor and the occupancy rules side by side, and second home or investment property explains why that box on the application carries so much weight.

Getting the replacement loan ready inside a short window

1. Your CPA and your qualified intermediary confirm your dates. The transfer date, the 45-day identification date, the 180th day, your return due date, and whether an extension is being filed.
2. A call with me before the replacement property goes under contract. I'll tell you which loan type fits and what your closing date needs to be on the contract. The contract's closing date has to come before the day your exchange period ends, with some room in front of it. If your deadline is April 15 rather than day 180, the contract is written for a closing before April 15.
3. The exchange paperwork. When you're ready, please provide the complete settlement statement or closing disclosure from the sale of the property you gave up, all pages, please, along with the 1031 exchange agreement from your qualified intermediary. We will need both to document where the down payment is coming from.
4. Your income documents, if the loan uses them. For a conventional investment property loan, please provide your most recent complete federal income tax return, all pages and schedules, please, including Schedule E, and I'll tell you if the year before is needed too. Please also provide your most recent two months of bank, investment or retirement account statements for the accounts you will use, all pages, even if the last page is intentionally left blank. A DSCR loan uses the property's rent and an appraisal instead, and I'll tell you which documents apply once we've picked the loan. If title will be held in an LLC on a loan that allows it, please include the LLC's articles of organization, its operating agreement and the SS-4 form or other document showing its federal tax ID number.
5. The appraisal and the closing date. The appraisal gets ordered as soon as the contract is signed, and the closing is scheduled with room before the deadline. I can't promise how long any step takes, so the loan starts early.

Common mistakes with a year-end 1031 calendar

Counting 180 days and stopping there. Day 180 is the deadline only when it comes before your return due date. For a sale on or after October 18, 2026, it doesn't, unless the return is extended.

Filing the 2026 return before asking the CPA about the exchange. The regulation ties the end of your exchange to the due date of that return, extensions included, so the extension and the timing of the return are decided with the CPA before anything gets filed.

Writing a contract closing date for the week of day 180. A closing scheduled for the last available week leaves no room for an appraisal that comes in late or a seller who needs an extra week. The contract date is set from the actual deadline, with room in front of it.

An illustration, with made-up dates

The dates below are made up to show the mechanism. They are not anyone's file.

Say you transfer a rental property on November 20, 2026 and file 2026 taxes as an individual on a calendar year.

  THE EXCHANGE CALENDAR
  ------------------------------------------------
  Transfer date                   November 20, 2026
  45th day (identification)        January 4, 2027
  180th day                            May 19, 2027
  2026 return due date               April 15, 2027
                                     --------------
  Deadline with no extension         April 15, 2027
  Days lost with no extension                    34

  WITH AN EXTENSION OF THE 2026 RETURN
  ------------------------------------------------
  Extended due date      after May 19 (CPA confirms)
  Deadline                             May 19, 2027
  Days kept                                     180

Without the extension, the replacement loan has to fund by April 15, 2027. With it, the loan has until May 19, 2027. Thirty-four days is the difference between a closing date the seller already agreed to and a contract that has to be rewritten.

A call before the replacement goes under contract

If you sold a rental property in late 2026, or your sale is closing between now and December 31, you're welcome to call me at (843) 765-0000 and we'll put the exchange dates and the loan dates on one page. Your CPA answers the tax questions, including the extension, and I make sure the loan is set up to fund before the date your CPA gives us.

Nothing here is tax advice, legal advice or a credit decision; the decision on any file is the lender's.

Common questions

Does my 1031 exchange deadline get shorter if I sell at the end of the year?

Yes, for a sale late enough that the 180th day falls after your tax return due date. Treasury Regulation 1.1031(k)-1(b)(2)(ii) ends the exchange period on the earlier of the 180th day after the transfer or the due date, with extensions, of your return for the year of the sale. For a calendar-year individual with a 2026 return due April 15, 2027, a transfer on or after October 18, 2026 hits April 15 before day 180. A transfer on October 17, 2026 has its 180th day on April 15 and keeps all of its days.

How does a tax return extension affect the 1031 exchange 180 days?

The regulation measures the due date "including extensions," so an extension of the return for the year of the sale moves the comparison date past the 180th day and restores the full exchange period. For an individual, the request is IRS Form 4868. Your CPA confirms your own due date, files the extension, and tells you when to file the return.

Can I use 1031 exchange funds as the down payment on a mortgage?

Yes. Fannie Mae's Selling Guide B3-4.3-10 says assets for the down payment from a like-kind exchange are eligible if properly documented and in compliance with Internal Revenue Code Section 1031. One of the lenders I work with asks for the sales contract on the property you sold and the 1031 exchange agreement, and lists the 45-day and 180-day conditions in its own guidelines.

Does my replacement property loan have to close before the 1031 deadline?

Yes. The exchange period is the time you have to receive the replacement property, and a financed purchase can't close until the loan funds. If your deadline is your return due date instead of day 180, the loan has to fund by that earlier date.

Can the IRS extend 1031 deadlines after a disaster?

The IRS can postpone the 45-day and 180-day deadlines for a 1031 exchange affected by a federally declared disaster. Each relief announcement names the areas it covers, and they are listed on its tax relief in disaster situations page. Your CPA checks whether you or either property is covered and what the postponed dates are.